Published in: April 1998
Publisher: Uitgeverij International Biggles Association
Size: A5
Binding: soft cover, stitched
Limited edition: 250 copies
Total number of pages: 52

Originally published in: Children's Gift Book, 1947

Tenth title in the bilingual series Captain Johns Uncollected Stories. This series has two front covers. One side is the Dutch translation with a Dutch cover illustration. The other side is the original English text with an English cover.

Worrals story: Worrals' friend Frecks is missing. She turns out to be taken prisoner by diamond smugglers in East Africa.